Hi - Based on the anecdotes I've been reading (how you discovered your own or your child's milk allergy) I think I'm hearing some misinformation. So here's my understanding about babies and milk: Breastfed babies DO have very loose stools. That's normal. They can also go for some time (days) between stools (followed by an explosion. Yuck.) That's normal too, provided the baby isn't in gastric pain. Moving from bresatmilk to any formula will solidify the stools. That has nothing to do with how well the baby is tolerating brestmilk vs. formula. It just means that she or he is eating a different food. If you want to know more details about diapers :-) a good lactation consultant, or the interesting newsgroup misc.kids.bresatfeeding, can get you started. Nutramigen and Alimentum, besides being fearfully expensive, both contain casein (cow's milk protein) in hydrolized form. It's easier for some milk-allergic babies to tolerate, but is just as bad as milk-based formulas for others. If your baby is milk-allergic, and you find out soon enough, you should *exclusively* breastfeed (zero formula supplementation) for at least six months, and the lactating mother shoudl consume NO cow's milk or other milk products. Then start solids cautiously. Make sure your pediatrician understands milk and other allergies. (Allergic babies have a tendency to develop other allergies, too.) Even soy formula is not ideal. It's estimated that about 30% of babies with mil allergy ALSO have soy allergy. Hoping I haven't muddied the waters too much, --Beth Kevles [log in to unmask] http://web.mit.edu/kevles/www/nomilk.html -- a page for the milk-allergic Disclaimer: Nothing in this message should be construed as medical advice. Please consult with your own medical practicioner.